Dan Seymour was a character actor in movies from the 1940s through the 1950s, then made occasional appearances on tv shows into the 1970s. He specialized in playing heavies, especially ethnic-types.
Mr. Seymour was listed in the Los Angeles phone directory when I called him in 1981. I believe the number was actually for his business, but he answered the phone himself. He was cordial, but explained he was busy and didn't have time to talk. He gave me his address so I could send him a photo for signing. I had only this scene still from "Key Largo" (1948) - that's him in the upper bunk- and I asked if he had a portrait. He also sent this nice composite.